SUBMILLIMETER FOLLOW-UP OF<i>WISE</i>-SELECTED HYPERLUMINOUS GALAXIES

Wu, Jingwen; Tsai, Chao-Wei; Sayers, Jack; Benford, Dominic J.; Bridge, Carrie; Blain, A. W.; Eisenhardt, Peter; Stern, Daniel; Petty, Sara; Assef, Roberto J.; Bussmann, Shane; Comerford, Julia M.; Cutri, R. M.; Evans, Neal J.; Griffith, R. L.; Jarrett, T. H.; Lake, Sean E.; Lonsdale, C. J.; Rho, Jeonghee; Stanford, S. A.; Weiner, Benjamin J.; Wright, E. L.; Yan, Lin

doi:10.1088/0004-637x/756/1/96

Cited by 146 publications

(350 citation statements)

References 77 publications

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“…At present, our 13 photometric data points prevent us from disentangling the true nature of the reddened quasar SEDs, which are more complicated than a two-component model can describe. These objects are in the company of other newly discovered, complicated systems that are not yet fully understood and not well matched to any known SEDs, e.g., the "hot DOGs" in Wu et al (2012) or the dust-rich quasars in Dai et al (2012). Glikman et al (2007Glikman et al ( , 2012 identified several quasars whose flux variability between the epochs of their optical and near-infrared observations mimicked reddening, but which, upon spectroscopic observations, revealed a normal blue quasar.…”

Section: The Effect Of a Host Galaxy Component To The Reddening Fitsmentioning

confidence: 96%

Dust Reddened Quasars in First and Ukidss: Beyond the Tip of the Iceberg

Glikman

Urrutia

Lacy

et al. 2013

ApJ

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We present the results of a pilot survey to find dust-reddened quasars by matching the Faint Images of the Radio Sky at Twenty-Centimeters (FIRST) radio catalog to the UKIDSS near-infrared survey and using optical data from Sloan Digital Sky Survey to select objects with very red colors. The deep K-band limit provided by UKIDSS allows for finding more heavily reddened quasars at higher redshifts as compared with previous work using FIRST and Two Micron All Sky Survey (2MASS). We selected 87 candidates with K 17.0 from the UKIDSS Large Area Survey (LAS) First Data Release (DR1), which covers 190 deg 2 . These candidates reach up to ∼1.5 mag below the 2MASS limit and obey the color criteria developed to identify dust-reddened quasars. We have obtained 61 spectroscopic observations in the optical and/or near-infrared, as well as classifications in the literature, and have identified 14 reddened quasars with E(B − V ) > 0.1, including 3 at z > 2. We study the infrared properties of the sample using photometry from the Wide-Field Infrared Survey Explorer and find that infrared colors improve the efficiency of red quasar selection, removing many contaminants in an infrared-to-optical color-selected sample alone. The highest-redshift quasars (z 2) are only moderately reddened, with E(B − V ) ∼ 0.2-0.3. We find that the surface density of red quasars rises sharply with faintness, comprising up to 17% of blue quasars at the same apparent K-band flux limit. We estimate that to reach more heavily reddened quasars (i.e., E(B − V ) 0.5) at z > 2 and a depth of K = 17, we would need to survey at least ∼2.5 times more area.

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Section: The Effect Of a Host Galaxy Component To The Reddening Fitsmentioning

confidence: 96%

Dust Reddened Quasars in First and Ukidss: Beyond the Tip of the Iceberg

Glikman

Urrutia

Lacy

et al. 2013

ApJ

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“…More recently, R W 4 -, where W4 is the WISE flux at 22 μm, used in conjunction with nondetections in the WISE W1 (3.4 μm) and W2 bands (see Eisenhardt et al 2012;Wu et al 2012, andStern et al 2014 for a discussion of W W 1 2 -dropout sources), have been shown to identify extremely reddened Type 1 quasars (Yan et al 2013;Ross et al 2014), though such objects are rare and have a low space density. Additionally, infrared-only colors, such as Spitzer IRAC color selection Stern et al 2005;Donley et al 2012) and WISE W W 1 2 -color selection (Stern et al 2012;Assef et al 2013), have been adopted to identify both unobscured and obscured AGNs, including Type 2 AGNs locally and at highredshift and highluminosity (e.g., Lacy et al 2015), though these color selections work best at brighter fluxes since star-forming galaxy contamination becomes significant at fainter fluxes (Barmby et al 2006;Cardamone et al 2008;Donley et al 2008;Mateos 2012;Mendez et al 2013).…”

Section: Selecting Reddened Broad-lined Agnsmentioning

confidence: 99%

On R − W1 as a Diagnostic to Discover Obscured Active Galactic Nuclei in Wide-Area X-Ray Surveys

LaMassa

Civano

Brusa

et al. 2016

ApJ

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Capitalizing on the all-sky coverage of WISEand the 35% and 50% sky coverage from Sloan Digital Sky Survey and Pan-STARRS, respectively, we explore the efficacy of-, as a color diagnostic to identify obscured supermassive black hole accretion in wide-area X-ray surveys. We use the ∼16.5 deg 2 Stripe 82 X-ray survey data as a testbed to compare R W1 -with R−K, an oft-used obscured active galactic nucleus (AGN) selection criterion, and examine where different classes of objects lie in this parameter space. Most stars follow a well-defined path in R−K versus R W1space. We demonstrate that optically normal galaxies hosting X-ray AGNs at redshifts z 0.5 1 < < can be recovered with an R W1 4 -> colorcut, while they typically are not selected as AGNs based on their W W 1 2 -colors. Additionally, different observed X-ray luminosity bins favor different regions in R W1 -parameter space: moderate-luminosity AGNs > -erg s −1 ) have bluer colors; higher spectroscopic completeness of the Stripe 82X sample is needed to determine whether this is a selection effect or an intrinsic property. Finally, we parameterize X-ray obscuration of Stripe 82X AGNs by calculating their hardness ratios (HRs) and find no clear trends between HR and optical reddening. Our results will help inform best-effort practices in followingup obscured AGN candidates in current and future wide-area, shallow X-ray surveys, including the all-sky eROSITA mission.

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“…Since they likely represent a short-lived crucial phase in the evolution of the most powerful AGN in the universe, probing the nuclear properties of such recently-discovered extreme objects can clearly benefit our understanding of overall AGN-galaxy co-evolution. This is our aim and here we report the first X-ray spectrum of a Hot DOG (namely WISE J183533.71+435549.1, hereafter W1835+4355, at z = 2.298, e.g., Wu et al 2012) obtained by XMM-Newton. Throughout this Letter we assume H 0 = 70 km s −1 Mpc −1 , Ω Λ = 0.73, and Ω M = 0.27.…”

Section: Introductionmentioning

confidence: 98%

The hidden quasar nucleus of a WISE-selected, hyperluminous, dust-obscured galaxy atz~ 2.3

Piconcelli

Vignali

Bianchi

et al. 2015

A&A

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We present the first X-ray spectrum of a hot dust-obscured galaxy (DOG), namely W1835+4355 at z ∼ 2.3. Hot DOGs represent a very rare population of hyperluminous (≥10 47 erg s −1 ), dust-enshrouded objects at z ≥ 2 recently discovered in the WISE All Sky Survey. The 40 ks XMM-Newton spectrum reveals a continuum as flat (Γ ∼ 0.8) as typically seen in heavily obscured AGN. This, along with the presence of strong Fe Kα emission, clearly suggests a reflection-dominated spectrum due to Compton-thick absorption. In this scenario, the observed luminosity of L 2−10 ∼ 2 × 10 44 erg s −1 is a fraction (<10%) of the intrinsic one, which is estimated to be > ∼ 5 × 10 45 erg s −1 by using several proxies. The Herschel data allow us to constrain the SED up to the sub-mm band, providing a reliable estimate of the quasar contribution (∼75%) to the IR luminosity as well as the amount of star formation (∼2100 M yr −1 ). Our results thus provide additional pieces of evidence that associate Hot DOGs with an exceptionally dusty phase during which luminous quasars and massive galaxies co-evolve and a very efficient and powerful AGN-driven feedback mechanism is predicted by models.

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SUBMILLIMETER FOLLOW-UP OFWISE-SELECTED HYPERLUMINOUS GALAXIES

Cited by 146 publications

References 77 publications

Dust Reddened Quasars in First and Ukidss: Beyond the Tip of the Iceberg

Dust Reddened Quasars in First and Ukidss: Beyond the Tip of the Iceberg

On R − W1 as a Diagnostic to Discover Obscured Active Galactic Nuclei in Wide-Area X-Ray Surveys

The hidden quasar nucleus of a WISE-selected, hyperluminous, dust-obscured galaxy atz~ 2.3

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